Development of the resonator type laser scattering system

2013 Fiscal Year Final Research Report

• Project/Area Number: 23760813
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: YASUHARA Ryo 核融合科学研究所, ヘリカル研究部, 助教 (30394290)
• Project Period (FY): 2011 – 2013
• Keywords: プラズマ計測 / トムソン散乱計測 / 高出力レーザー

Research Abstract

A novel configuration of the multi-pass Thomson scattering (TS) system is proposed to improve the time resolution and accuracy of electron temperature measurements by use of a polarization control technique and the image relay optics. This configuration can realize a perfect coaxial multi-passing at each pass, and the number of round trips is not limited by the optical configuration. To confirm the feasibility of the new method, we installed this system in the GAMMA 10 and Large Helical Device. We have confirmed the multi-pass scattering signal from the plasma. These results are in good agreement with the design.

Research Products

• [Journal Article] Temperature dependence of thermo-optic effects of single-crystal and ceramic TGG (2013)
  • Author(s): R. Yasuhara, H. Nozawa, T. Yanagitani, S. Motokoshi, and J. Kawanaka
  • Journal Title: Optics express Volume: Vol. 21 Pages: 31443-31452
  • Peer Reviewed
• [Journal Article] Thermally induced depolarization in TGG ceramics (2013)
  • Author(s): R. Yasuhara and H. Furuse
  • Journal Title: Optics letters Volume: Vol. 38 Pages: 1751-1753
  • Peer Reviewed
• [Journal Article] Design of the photon recycling probe laser for the divertor Thomson scattering system in GAMMA10 (2013)
  • Author(s): R. Ya suhara, M. Yoshikawa, I. Yamada, K. Kawahata, H. Funaba, M. Sakamoto, Y. Nakashima, T. Imai
  • Journal Title: Fusion Science and Technology Volume: Vol.63 Pages: 408-410
  • Peer Reviewed
• [Journal Article] Polarization-Controlled Multi-Pass Thomson Scattering System in the Tandem Mirror GAMMA 10 (2013)
  • Author(s): Masashi Yoshikawa, Ryo Yasuhara, Seito Sakamoto, Ryo Sekiguchi, Yoriko Shima, Junko Kohagura, Mizuki Sakamoto, Yousuke Nakashima, Tsuyoshi Imai, Makoto Ichimura, Ichihiro Yamada, Hisamichi Funaba, Kazuo Kawahata and Takashi Minami
  • Journal Title: Plasma and Fusion Research Volume: Volume 8 Pages: 1205169
  • Peer Reviewed
• [Journal Article] Fiber interferometer for calibration of electron density profile measured by Thomson scattering in LHD (2012)
  • Author(s): R. Yasuhara, T. Akiyama, I. Yamada, K. Kawahata and S. Tokita
  • Journal Title: Journal of Instrumentation Volume: Vol.7 Pages: C01090
  • Peer Reviewed
• [Journal Article] Coaxial Multiple Laser Beam Combiner for the LHD Thomson Scattering System (2012)
  • Author(s): R. Yasuhara, I. Yamada, K. Narihara, H. Funaba and H. Hayashi
  • Journal Title: Plasma and Fusion Research Volume: Vol. 7 Pages: 2402030
  • Peer Reviewed
• [Journal Article] Design of the polarization multi-pass Thomson scattering system (2012)
  • Author(s): R. Yasuhara, M. Yoshikawa, M. Morimoto, I. Yamada, K. Kawahata, H. Funaba, Y. Shima, J. Kohagura, M. Sakamoto, Y. Nakashima, T. Imai, and T. Minami
  • Journal Title: Review of Scientific Instruments Volume: Vol. 83 Pages: 10E326
  • Peer Reviewed
• [Journal Article] Evaluation of thermo-optic characteristics of cryogenically cooled Yb : YAG ceramics (2012)
  • Author(s): R. Yasuhara, H. Furuse, A. Iwamoto, J. Kawanaka, and T. Yanagitani
  • Journal Title: Optics Express Volume: Vol. 20, Issue 28 Pages: 29531-29539
  • Peer Reviewed
• [Presentation] GAMMA10におけるThomson散乱計測システムの進展 (2013)
  • Author(s): 吉川正志,長洲和英,島村侑希,安原亮,嶋頼子,森下雅央,北川和,坂本瑞樹,中嶋洋輔,今井剛,山田一博,舟場久芳,南貴司,市村真
  • Organizer: 05aE28Pプラズマ核融合学会第30回年会
  • Place of Presentation: 東京工業大学、ポスター発表
  • Year and Date: 20131203-06
• [Presentation] Design and demonstration of the double pass Thomson scattering measurement in LHD (2013)
  • Author(s): R. Ya suhara, I. Yamada, E. Yatsuka, M. Yoshikawa, H. Funaba, H. Hayashi, H. Tojo, and T. Hatae
  • Organizer: 16th International symposium Laser Aided Plasma Diagnostics(LAPD 16)
  • Place of Presentation: Madison, Wisconsin USA
  • Year and Date: 20130922-26
• [Presentation] LHD偏光マルチパストムソン散乱計測システムの開発 (2012)
  • Author(s): 安原亮,山田一博,吉川正志,波多江仰紀,谷塚英一,林浩,舟場久芳
  • Organizer: プラズマ・核融合学会
  • Place of Presentation: クローバープラザ(福岡)
  • Year and Date: 20121127-30
• [Presentation] LHDトムソン散乱装置の測定温度領域の拡大 (2012)
  • Author(s): 山田一博,成原一途,安原亮,舟場久芳,林浩,河本俊和
  • Organizer: プラズマ・核融合学会
  • Place of Presentation: クローバープラザ(福岡)
  • Year and Date: 20121127-30
• [Presentation] Development of polarization-controlled multi-pass Thomson scattering system in the GAMMA 10 tandem mirror (2012)
  • Author(s): M. Yoshikawa, R. Yasuhara, M. Morimoto, Y. Shima, J. Kohagura, M. Sakamoto, Y. Nakashima, T. Imai, I. Yamada, K. Kawahata, H. Funaba, and T. Minami
  • Organizer: High Temperature Plasma Diagnostics 2012
  • Year and Date: 20120000
• [Remarks]
  • URL: http://www.nifs.ac.jp/index.html